chore: move xml2js into the repo to eliminate npm git dependency

Small rewrites to the xml2js code as ES6 modules. Based on
https://github.com/keymanapp/dependency-node-xml2js

Fixes: #8616

common/web/types/package.json

@@ -33,7 +33,8 @@
     "@keymanapp/keyman-version": "*",
     "restructure": "3.0.1",
     "semver": "^7.5.2",
-    "xml2js": "git+https://github.com/keymanapp/dependency-node-xml2js#535fe732dc408d697e0f847c944cc45f0baf0829"
+    "sax": ">=0.6.0",
+    "xmlbuilder": "~11.0.0"
   },
   "devDependencies": {
     "@types/chai": "^4.1.7",
@@ -70,6 +71,7 @@
     ],
     "exclude-after-remap": true,
     "exclude": [
+      "src/deps/",
       "src/kmx/kmx-plus-builder/",
       "src/kmx/kmx-plus.ts",
       "src/kmx/kmx-builder.ts",

common/web/types/src/deps/xml2js/LICENSE

@@ -0,0 +1,19 @@
+Copyright 2010, 2011, 2012, 2013. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.